Locomotive truck



B. WHEELER LOCOMOTIVE TRUCK Oct. 27, 1931.

Filed Dec. 2 Sheets-Sheet l INVENTOR Brian h/h ee/er,"

ATTORNEY Minessea.

LOCOMOTIVE TRUCK Oct. 27, 1931.

Filed Dec.

19, 1930 2 Sheets Sheet 2 fig? 4 6 i u 6/! O a INVENTOR Er/an Wheeler M'fnesses AITTORNEY Patented Oct. 27, 1931 BRLAN WHEELER, OF WILKINSBURG, PENNSYLVANIA, ASSIGNOB. TO WESTINGHOUSE ELECTRIC & MANUFACTURING COMPANY, A CORPORATION OF PENNSYLVANIA DOCOMOTIVE TRUCK Application filed December 19, 1930. Serial No. 503,441.

My invention relates generally to locomotives and, more particularly, to locomotive trucks. 4

The object of my invention, generally stated, is the provision of a truck fora locomotive that shall be simple andeflicient in operation and readily and economically manufactured and installed.

A more specific object of my invention is to provide for guiding the movements of the locomotive super-structure to prevent the imposing of an excessive side thrust on the main driving wheels when the locomotive is moving on a curved track. 7

A further object of my invention is to i provide a connection-between the axle and the super-structure of a locomotive which permits the locating ot the resilient member of the connection in a position to 'permlt it to be made of a length which will give the desired resilience.

Other objects of the invention will, in part, be obvious and will, in part, appear hereinafter.

"The invention is disclosed in the embodiment thereoi shown in the accompanying drawings and comprises the structural featuresfthe combination of elements and the arrangement of parts that will be exemplifled in the structure hereinafter set forth, and the scope ofthe application of which will be indicated in the claims.

F or a fuller understanding of the nature and-objects of the invention, referenceshould be had to the following detailed description,

' taken in connection with the accompanying relative positions 01" the members of the connection when the truck is displaced from its central position, as it will be, when the locomotive is moving on a curved track, and

Fig. is a vector diagram representing the magnitude and the direction of the forces set up in the members of the connection when the truck is displaced, as shown in Fig. 4.

Referring now to the drawings, 10 designates a locomotive super-structure provided with a center-pin bearing 11 for the reception of a center pin 12. As shown, the center pin 12 is provided with an elongated head 13 which depends from the locomotive superstructure.

The wheels 18 and the axle 16, which carry the truck 15, are of the type commonly utilized in locomotive construct-ion. As illustrated in Fig. 1, a tail piece 38, is carried by the truck 15 and is fulcrumed, in the usual manner, to the locomotive super-structure 10 at a point 34-. The tail piece 33 and the truck 15 constitute a support for a motor 35 which is connected to the axle 16 by a train of gears.

As will be noted, the truck 15 has two spaced depressed bearing surfaces 21 and 22 which form a seat to receive projections 26 and 27 provided on support 24. Since the support 24 is merely superimposed on the truck, it may oscillate when subjected to predetermined side thrusts, such as are encountered when the locomotive is moving on a curved track. However, the structural features of the seat 20 and the supports '24 are not limited to the preferred forms illustrated in the accompanying drawings but may be designed with any desired physical features to meet operating conditions. As will be observed in Fig. 3, the supports 24 carry leaf springs of the ordinary type, which are mounted to extend transversely of the truck '15 and are disposed on opposite sides of the center-pin head 13. It is to 'be understood that, in designing locomotives, some latitude isallowed for locating the springs 25. For instance, "the springs 25 may be located on one side only of the center-pin head 13 and mounted either above or below the axle '16. The supporting members 29 ot the connection depend fromtheends of the springs 25 and the center-pin head 13.

' As will be observedffrom an examination of Fig. i, when the locomotive super-struc- 'of the spring '25.

ture moves laterally relative to the truck 15, there is substantially no lateral movement 7 The movement of the springs is an oscillatory one about apoint in the seat 20, and the .arc in which the end of Therefore, with this type of structure, alonger spring having greater resilience canbe provided than is utilized in other types of loco motive trucks, because 'in'prior' art structures,

the spring and truck may be given a lateral relative movement,wh ch necessitates making thespring shorter than the-distance betweenthe truckiwheels by a length equal to the clearances and throw of the relative lat eral movement. 7

' In operation, when the locomotive 1s mov.

ing on a curved track, the truck 15 is moved laterally carrying the supports 24; and the springs with it At the same time, the

locomotive super structure 10 prevents the center-pm head 13 from moving laterally withathe truck 15 and thus the supporting V ing on acurved track, it will be noted that members '29 cause the springs 25 and the supports 2% to. take the relative positions shown in Fig et.

-Q Referring to Fig. 5 whichisa vector diagram of the forces setup in the members of thejconnection when the locomotive 1s movresultant forces Ar, Br and Cr are setup, respectively, atpoints A,B and C. The resultant forceAr is resolved into a horizontal force ofniagnitude Ah and a vertical force of magnitude Ac. Similarly, the resultant forces'Br and Or, at points B and C, are

resolved into horizontal forces of magnitude Bh, and Ch, respectively, and vertical forces of magnitude Br and Cr, respectively. By

reason of the relative positions of the mem- 'bers of the, connection, the horizontal force Ah is greater in magnitude than the horizontalv-force Bk and of the opposite'direction. Therefore, in order for the members of the connection to be in equilibrium, 2. liorizon- 1 50 tel force Ch isset up at point C having a magnitude equal to the difference between the horizontal force Ah and the horizontal force Bk andv a direction opposite to force Bia The horizontal force Ch acts as a guid ing force for guiding the movements ofthe locomotive super-structure which prevents the imposing of an excessive sidethrust on the driving Wheels when the locomotive is moving on a curved track.

the illustrated example constitutes aprac- Iwould state, in conclusion, that, while tical embodiment of my invention, 1 do not limit myself strictly to the exact details herein illustrated, since modifications of'thesame may be varied considerably without departing. from the spirit of the invention as defined in the appended claims.

I claim as my invention: a

1. 'A connection for supporting a locomotive center-pin head on a truck frame comprising, combination, a supporthaving spaced projections for seating on the truck frame to oppose oscillatory movements of the connection, aispringcarried by'the'sup; springmovesissubstantially a vertlcalline. p

ort, and supporting imembers carried: by

the ends of the spring and connected'to the center-pin head. V 3..A connection for supporting a locomotivecenter-pin head on the truck frame comprising, in combination, a support having spaced projections for seating onthe truck frame to oppose oscillatory movements of the connection, a spring carried by the support and disposed above the truck frame, and supporting memlbersjdepending fromthe ends ofthe spring and connected-,at a point below the; support for the spring,--to the center-pin-head; A I

4. A connection for supportinga locomotive super-structure on the truck frame comprising, in combination, 7 supports having spaced projections for seating'on the truck frame to oppose oscillatory movement of the connection, springs carried bythesupports and disposed at spaced longitudinal distances, a center-pin head disposed'tocarry the locomotive super structure and dependingintermediatesaid springs, and supporting members mounted on; the, ends of the springs and. connected to the center-pin head. 7 V 5. A connection for supporting a locomotives'uper-structure 'on-the truck frame comprising, in combination, supports having spaced projections for seating on the-truck frame to oppose oscillatorymovement of the connection, springs carried by the supports and disposed above the truck frame at spaced longitudinal distances, a center-pin head disposed to carry the locomotive super-structure and depending intermediate said springs, and supporting members mounted on the ends of the springs and connected, at a point below the support for the spring, to the center-pin head.

7. A connection for supporting a locomotive center-pin head on a truck frame comprising, in combination, a support making engagement with the truck frame, a spring carried by the support and supporting members mounted on the ends of the spring and connected to the center-pin head.

. carried by the support, said spring being disposed above the truck frame, and supporting members mounted on the ends of the spring and connected to the center-pin head.

9. A connection for supporting a locomotive center-pin head on a truck frame comprising, in combination, a support making engagement with the truck frame, a spring carried by the support, said spring being disposed above the truck frame, and supporting members mounted on the ends of the spring and connected, at a point below the support for the spring, to the center-pin head.

10. A connection for supporting a locomotive center-pin head on a truck frame comprising, in combination, a support making a plurality of engagements with the truck frame, a spring carried by the support, and supporting members mounted on the ends of the spring and connected to the center-pin head.

11. A connection for supporting a locomotive center-pin head on a truck frame comprising, in combination, a support making a plurality of engagements with the truck frame, a spring carried by the support, said spring being disposed above the truck frame, and supporting members mounted on the ends of the spring and connected to the center-pin head.

12. A connection for supporting a locomotive super-structure on a truck frame comprising, in combination, supports making engagement with the truck frame, springs carried by the supports, said springs being disposed at spaced longitudinal distances, a center-pin head disposed to carry the locomotive super-structure and depending intermediate said springs, an d supporting members mounted on the ends of the spring and connected to the center-pin head.

13. A connection for supporting a locomotive super-structure on a truck frame comprising, in combination, supports making engagement with the truck frame, springs carried by the supports, said springs being dis.-

posed above the truck frame at spaced longitudinal distances, a center-pin head disposed to carry the locomotive super-structure and depending intermediate said springs, and supporting members mounted on the ends of the spring and connected to the center-pin head.

14. A connection for supporting a locomotive super-structure 011 a truck frame comprising, in combination, supports making a plurality of engagements with the truck frame, springs carried by the supports, said springs being disposed at spaced longitudinal distances, a center-pin head disposed to carry the locomotive super-structure and depending intermediate said springs, and supporting members mounted on the ends of the spring and connected to the center-pin head.

15. A connection for supporting a locomotive super-structure on a truck frame comprising, in combination, supports making a plurality of engagements with the truck frame, springs carried by the supports, said springs being disposed above the truck frame at spaced longitudinal distances, a center-pin head disposed to carry the locomotive superstructure and depending intermediate said springs, and supporting members mounted on the ends of the spring and connected to the center-pin head.

In testimony whereof, I have hereunto subscribed my name this 12th day of December, 1980.

BRIAN WHEELER. 

